等待 发表于 2025-3-25 06:27:47

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土坯 发表于 2025-3-25 09:55:46

Graphs,reader is referred to books of Harary (1967), Harris ( 1970) and Busacker and Saaty (1965) for evidence to support this claim, since our motivation for touching on the subject here is different. Many of the ideas which we shall encounter later can be met, in a diluted form, in the simpler situation

检查 发表于 2025-3-25 14:31:23

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Estimable 发表于 2025-3-25 17:21:45

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高兴去去 发表于 2025-3-26 00:02:45

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圆木可阻碍 发表于 2025-3-26 03:40:38

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Instantaneous 发表于 2025-3-26 05:22:42

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HUSH 发表于 2025-3-26 08:39:28

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diskitis 发表于 2025-3-26 14:26:37

Homology modulo 2,y so that it applies to unoriented simplicial complexes. Roughly speaking if an oriented simplex a and the same simplex with opposite orientation, -σ, are to be regarded as giving the same chain, then −1 = +1 and so the coefficients must be regarded as lying in the group (or field) ZZ. instead of in

chuckle 发表于 2025-3-26 18:06:20

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